Asthma is a chronic disease affecting around 4 million people in France and 340 million worldwide. Allergic asthma is characterized by inflammation of the bronchial tubes and respiratory discomfort caused by the inhalation of allergens, most often dust mites. This exposure to dust mites and other allergens leads to the production of antibodies called immunoglobulin E (IgE) and type 2 cytokines (such as interleukin-4 (IL-4) and IL-13) in the airways. This leads to a cascade of reactions resulting in hyperresponsiveness of the respiratory tract, overproduction of mucus, and eosinophilia (when there are too many eosinophils, a type of white blood cell, in the airways).
Inhaled corticosteroids are the gold standard for controlling asthma. However, in the case of severe asthma, this treatment is not enough. The use of therapeutic monoclonal antibodies that target IgE or the IL-4 and IL-13 pathways is then required. However, these are costly and require the long-term or even lifelong administration of injections.
To overcome this problem, researchers from Inserm, Institut Pasteur, and the company NEOVACS, have developed a conjugate vaccine, called a kinoid, by coupling the recombinant cytokines IL-4 and IL-13 with a carrier protein called CRM197 (a non-pathogenic mutated form of the diphtheria toxin, used in many conjugate vaccines).
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Nature Communications. Research Paper:
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